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Definition of Macroevolution
1. Noun. Evolution on a large scale extending over geologic era and resulting in the formation of new taxonomic groups.
Definition of Macroevolution
1. [n -S]
Medical Definition of Macroevolution
1. Evolution on a species level (speciation and extinction) and at higher taxonomic classifications (appearance and disappearance of genuses, families, orders, etc.). (09 Oct 1997)